1.TUBES

Tube diameters (mm)

20—219

Tube wall thickness(mm)

2—15

Tube length (mm)

5000—18000

Tube material

Carbon steel, low alloy steel, stainless steel, heat resistant high, high alloy steel

2.FIN

Fin thickness(mm)

0.8—3

Fin height(after welding) (mm)

10—35

Fin material

Carbon steel, low alloy steel, stainless steel.

Segment Width(mm)-for serrated fins

4

Uncut base(mm)-for serrated fins

8(±1.7mm)

3. ELECTRIC EQUIPMENT  

hi-frequency welding equipment                                  

GP300KW-H

frequency converter、PLC、Contact operation screen

SIMENS

4.PERFORMANCE PARAMETERS(works size)

Fin per inch(FPI)

1-6

Welding position from tube(mm)

70

5.TESTING

Tensile Test

Acceptance criteria-170Mpa

Fin tube straightness

MAX.5mm per 3000mm

6.ELECTRIC POWER SUPPLY

Voltage

380V,3 phases

Frequency

50 Hz

7.AIR SUPPLY

Compressed air

4-6 kg/cm2

8.

Total Price(ex-factory)

$400000

9.

Delivery Period

150 working days

1.TUBES

Tube diameters (mm)

32—51（duplex tube）/60(single tube)

Tube wall thickness(mm)

≥3

Tube length (mm)

1000—12000

Tube material

Carbon steel, low alloy steel, stainless steel, high alloy steel

Double center distance(mm)

70—133

2.FIN

Fin thickness(mm)

2—3

Fin width (mm)

≤60

Fin height (mm)

≤280（duplex tube）/≤140(single tube)

Fin density (mm)

15—50

Fin material

Carbon steel, low alloy steel, stainless steel.

3. ELECTRIC EQUIPMENT  

Welding transformer power                                  

3× 200KVA（Three phase）

Rated primary current

700A

Rated secondary current

35KA

4.PERFORMANCE PARAMETERS(works size)

Welding position from tube(mm)

50

5.TESTING

Tensile Test

Acceptance criteria-150Mpa

6.ELECTRIC POWER SUPPLY

Voltage

380V,3 phases

Frequency

50 Hz

7.AIR SUPPLY

Compressed air

4-8 kg/cm2

8.

Total Price(ex-factory)

$150000

9.

Delivery Period

100 working days